Also catch UnsupportedOperationException in FuzzingTest

Author: ebourg

jsign-core/src/test/java/net/jsign/FuzzingTest.java

@@ -62,7 +62,7 @@ public void testFuzzing() throws Exception {
                 AuthenticodeSigner signer = new AuthenticodeSigner(keystore, "test", "password").withTimestamping(false);
                 signer.sign(signable);
             }
-        } catch (IOException e) {
+        } catch (IOException | UnsupportedOperationException e) {
             // expected
         }
     }